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Tag: "diversity" at biology news

The origin of the brain lies in a worm

...might have looked like and how it gave rise to the diversity of nervous systems seen in animals today is what Detlev Arendt and his group study at EMBL. To do so, they investigate the nervous system of a marine annelid worm called Platynereis dumerilii. "Platynereis can be considered a living fossil," says A...

Biologists produce global map of plant biodiversity

...ropical regions long ago recognized this increased diversity over more temperate regions, the general understan...cological research like ours that captures complex diversity - environment relationships on a global scale may assist in a small, but important way so that such ...

Baby fish 'smell their way home'

...A, also shines a new light on how the breathtaking diversity of fish on coral reefs has arisen. This has major ...ometres or even hundreds of metres apart." This diversity between populations of the same fish species is what drives evolution on the Reef and underpins the ...

Too much of a good thing? Excess nutrients or water limit biodiversity

... thing (nutrients or water) actually decreases the diversity of species in an ecosystem while it increases the ... Minnesota researchers. The reduction in species diversity occurs because increasing the amounts of limiting resources, such as nitrogen and water, makes an ec...

Genomics throws species definition in question for microbes

...the late 1800s, in order to make sense of the vast diversity of microbiological organisms, microbial taxonomist...ic information into our understanding of microbial diversity and enable researchers to map phenotypes to genomes. ...

Vaccine to cope with viral diversity in HIV

...ability of HIV-1 to develop high levels of genetic diversity and acquire mutations to escape immune pressures c...t algorithm to develop vaccines that cope with the diversity of HIV or other variable pathogens. This computational method clarifies and analyzes the variation ...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

... of 'global warming' may have kick-started today's diversity ?not the death of the dinosaurs. "This discovery rewrites our understanding of how we came to evolve on this planet, and the study as a whole gives a much clearer picture than ever before as to our place in nature." Dr Kate Jones from the Zoolo...

MIT's ocean model precisely mimics microbes' life cycles

...odel of the ocean is the first to reflect the vast diversity of the invisible forests living in our oceans-tiny...t because previous ocean models did not convey the diversity of phytoplankton, they did not well represent the systems they modeled. The new model remedies that....

Biologists call for better choice of model organisms in 'evo-devo'

... "There is little point in blindly increasing the diversity of model systems, without some specific goals in mind. "Our toolkit is too narrow, so as a community we need to clarify our objectives and set the agenda for future studies."...

By 2048 all current fish, seafood species projected to collapse

...f shorelines by marine species. The loss of marine diversity also appeared to increase the risks of beach closu...ected to improve marine biodiversity. "We see that diversity of species recovered dramatically, and with it the ecosystem's productivity and stability." Resear...

More species in the tropics because species have been there longer

...cs may have more ancient lineages and more genetic diversity per species than temperate regions. So there may be far more loss of diversity going on as we lose tropical rainforests than would be suggested by the number of species alone." ...

Early-stage immune system control of HIV may depend on inherited factors

...ay be better able to control viral levels, but the diversity of HLA molecules ?each person may have up to six different varieties of Class I proteins ?has made investigating the role of HLA type in HIV infection challenging. The current study was designed to determine the contribution of both HLA Class I ...

Invasive ants territorial when neighbors are not kin

...r results are strong evidence that lack of genetic diversity permits supercolonies to arise," said Melissa Thomas, who was a postdoctoral fellow working with Holway when she collected the data on territorial interactions. "Workers cannot differentiate between nestmates and non-nestmates if they all seem the s...

Theory of oscillations may explain biological mysteries

...gical conundrums, such as the higher-than-expected diversity of plankton in aquatic ecosystems, may be explained this way. Physicists know that even a weak coupling between oscillating systems can yield synchronized oscillations, a phenomenon that was studied with pendulums by the seventeenth century Dutch ma...

Bacteria in small sea life yield new way to make potential cancer drugs

...enes is that you can access the tremendous natural diversity of the world's organisms to find new natural compo...les. By examining the natural chemical and genetic diversity found in sea squirts and their symbionts, Schmidt and his colleagues from around the country identif...

Evolution of influenza A virus

...cally in influenza virus, and that influenza virus diversity and evolution is strongly affected by chance events, such as reassortment between strains coinfecting a host or the introduction of a particular variant from elsewhere. These factors make predicting future patterns of influenza virus evolution more d...

Hundreds of thousands of viral species present in the world's oceans

...d colleagues detail their metagenomic study of the diversity of bacteriophage present in water samples collecte...tioning. This approach identified tremendous viral diversity with greater than 91% of DNA sequences not present in existing databases. Angly and colleagues an...

Cracking the egg

...an early embryo development. There's a far greater diversity of RNAs in the egg cell than in the two-cell embry... for the origin of new species, and an astonishing diversity of mammals inhabiting Earth." ...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...dson revises his groundbreaking 1990 census on the diversity of discoverable dinosaurs upward by 50%, offering ...y in China and Mongolia, has resulted in a greater diversity among dinosaur researchers. Ultimately, however, there are only so many dinosaurs that can be fou...

Global changes alter the timing of plant growth, scientists say

...changes, it could lead to decreases in local plant diversity and negatively impact animals that depend on those plants." Satellite images in recent years have revealed that some regions of the globe are "greening" earlier in the spring--another signal that the Earth is responding to overall warming. The resu...

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